Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
January 13, 2021
Submitted
February 15, 2021
Operation
Air carrier
Aircraft
N406WN
Make and model
Boeing 7377H4
Aircraft serial
27894
Aircraft time
66,898 hours, 39,718 cycles
Part
Stringer
Condition
Corroded
Location
E/E Bay
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CORROSION STRUCTURE STRINGER 23RH AT BST 360 MORE 4 INCH AT EQUIPMENT ELECTRONIC COMP WL 165.00 / EVALUATION CORROSION ON STRUCTURE STRINGER 23RH AT BS360 MORE 4 INCH AT EQUIPMENT ELECTRONIC COMPARTMENT AND FOUND OUT OF ALLOWABLE DAMAGE LIMITS I.A.W B737-700SRM 53-00-03-1A-1 ALLOWABLE DAMAGE 1 AND PERFORMED PERMANENT REPAIR ON STRINGER 23RH BTW BS 360 TO BS 400 I.A.W B737-700 SRM 53-00-03-2R-1 REPAIR 1 FIG. 206 REPAIR PARTS STRINGER SECTION MADE FROM 7075 TO 0.036 PO 2020 214270 AND CHANNEL AND ANGLES (2 E/A) MADE FROM 7075 - TO /0.040 PO 2015 506435 REPAIR PARTS HEAT TREATED AND CONVERTED 7075 T6.

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